Ключевые слова: big, building, bulldozer, business, car, career, coal, construction, dig, digger, dirt, dirty, dump, engine, environment, equipment, excavation, excavator, gravel, ground, heavy, hydraulic, industrial, industry, iron, large, loader, loading, machine, machinery, metal, mine, miner, mineral, mover, open, power, quarry, road, rock, sand, site, tractor, transport, truck, vehicle, wheel, work, worker, yellow,